Power System & Power Quality Software Training Tools

Electrotek Concepts has developed several workbooks to train engineers and other personnel in the use of the PSCAD and SuperHarm software programs. Used by our staff in our software training programs, these resources can help you become familiar, in a group or individual setting, with these programs.

SuperHarm Case Study Workbook

Developed by Electrotek Concepts, SuperHarm® is used to perform steady-state frequency domain analysis for harmonic investigations. These investigations are typically performed using steady-state analysis techniques at the individual harmonic frequencies. In general, harmonic producing loads can be modeled as harmonic current sources, and the simulations are used to predict harmonic voltages and currents throughout the customer and utility systems. Overloading of neutral conductors, transformer heating considerations, resonances caused by capacitor applications, and harmonic currents injected onto the utility system can be evaluated in the simulations. The workbook is divided into five volumes:

Overview of Harmonics

Definitions

Sources of Harmonics

Frequency Response and Resonances

Basic Filter Design

Introduction to SuperHarm and TOP, The Output Processor

Using SuperHarm

SuperHarm Devices

Interfacing with TOP, The Output Processor

System Modeling Techniques

Study Procedures and Model Size

Model Verification

Modeling Linear Elements

Modeling Nonlinear Elements

Industrial & Commercial Studies

Advanced Features I – Inline Math

Harmonics in Commercial Facilities

Harmonics in Industrial Plants

Advanced Features II – Include and Library Files

Distribution System Concerns

Advanced Features III – Batch Solutions and Switches

ASD Impacts Study

Feeder Resonance Study

Advanced Features IV – Using Comparatives

Capacitor Impact Study

Appendix I - Supplemental Cases

Appendix II - Nonlinear Load Models

The case studies provided in the workbook are intended to involve the user in an active learning process. Each case study describes the phenomena of interest, illustrates the preparation of input data, and presents selected output. In addition, suggested exercises are provided so the user can more conveniently experiment with the cases.

PSCAD Case Study Workbook

PSCAD® is a general-purpose time domain simulation tool for studying transient behavior of electrical networks. The program includes a comprehensive library of models encompassing all aspects of AC and DC power systems and controls. To augment the component library, the program provides the ability to create user models and libraries with the built-in graphical Component Workshop.

PSCAD enables the user to design complex circuits in a fraction of the time that would otherwise be spent with text-based or semi-graphical tools. Because of advanced technology, circuits that were otherwise too complex to process can now be systematically analyzed.

Studies involving use of the PSCAD fall in two general categories. One is design, which includes insulation coordination, equipment ratings, protective device specification, control systems design, etc. The other is solving operational problems such as unexplained outages or equipment failures.

Developed by Electrotek Concepts, this workbook includes the following sections:

Introduction and PSCAD Applications

PSCAD Applications

Viewing PSCAD Output with TOP

Suggested Study Procedure

System Modeling Techniques

Modeling Linear Power System Elements

Modeling Nonlinear Power System Elements

Developing Custom Components & Page Modules

Electrotek’s PSCAD Custom Component Library

Introduction to Power System Transients

Capacitor Switching Transients

Back-to-Back Switching and Outrush Current

Capacitor Switch Restrike Event

Magnification of Capacitor Switching Transients

Nuisance Tripping of Adjustable-Speed Drives

Transients at Transformer Terminations

Transmission Line Energizing

Transformer Energizing

Ferroresonance

345kV Transient Recovery Voltage

Voltage Sag Analysis

Harmonic Evaluations

Frequency Scans and Harmonic Source Models

Instrument Transformer Modeling

Modeling Power Electronic Devices

Appendix 1 – Developing Custom Components – Example Case

Appendix 2 – Developing Page Modules – Example Case

The case studies provided in the workbook are intended to involve the user in an active learning process. Each case study describes the phenomena of interest, illustrates the preparation of input data, and presents selected output. In addition, suggested exercises are provided so the user can more conveniently experiment with the cases. Data files for all of the case studies are provided.

Availability

These items can be downloaded from the subscribers area of the PQSoft website. For more information, send e-mail to pqsoft@electrotek.com or call 865-470-9222.

"Electrotek Concepts" is a registered service mark of Electrotek Concepts, Inc."PQSoft" is a registered trademark of Electrotek Concepts, Inc.